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Finding the Fourth Proportional to 257,266.80, 385,900.20 and 70,278.30

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Solution

The fourth proportional to 257,266.80, 385,900.20 and 70,278.30 is: 105,417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,266.80 : 385,900.20 = 70,278.30 : x
  2. Step 2: Convert to fraction form
    257,266.80/385,900.20 = 70,278.30/x
  3. Step 3: Cross multiply
    257,266.80x = 385,900.20 × 70,278.30
  4. Step 4: Simplify right side
    257,266.80x = 27,120,410,025.66
  5. Step 5: Solve for x
    x = 27,120,410,025.66/257,266.80
  6. Step 6: Final answer
    x = 105,417.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.